Rivian CFO Claire McDonough forfeits 730K stock units

The forfeited awards were unvested, and the reported direct shareholding after the transaction was 88,886 shares.

Available on EDGAR 10/30/2026 - 05:33 PM EDT Accepted by SEC EDGAR 10/30/2026 - 05:33 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Rivian Automotive, Inc. (RIVN) Chief Financial Officer Claire McDonough forfeited 730,292 unvested restricted stock units when her resignation became effective October 30, 2026. Rivian lists 88,886 shares of Class A common stock held directly after the transaction. As of the effective date, McDonough was no longer subject to Section 16.

Insider Trade Summary

Disposition: 730,292 shares

Disposition 1 txn

Insider McDonough Claire

Role Chief Financial Officer

Type	Security	Shares	Price	Value
Disposition	Class A Common Stock F1	730,292	$0.00	$0.00

Holdings After Transaction: Class A Common Stock — 88,886 shares (Direct)

Footnotes (1)

1. F1. As a result of Reporting Person's resignation as Chief Financial Officer of the Issuer effective October 30, 2026 (the "Effective Date"), as previously disclosed by the Issuer in its Current Report on Form 8-K filed with the Securities and Exchange Commission on August 27, 2026, as of the Effective Date the Reporting Person forfeited 730,292 unvested Restricted Stock Units previously granted. As of the Effective Date the Reporting Person is no longer subject to Section 16.

Key Figures

Unvested Restricted Stock Units forfeited: 730,292 Restricted Stock Units Direct Class A common stock holdings after transaction: 88,886 shares Resignation effective date: October 30, 2026

3 metrics

Unvested Restricted Stock Units forfeited 730,292 Restricted Stock Units Upon Claire McDonough's resignation

Direct Class A common stock holdings after transaction 88,886 shares Reported resulting position

Resignation effective date October 30, 2026 Effective date of the forfeiture

Key Terms

Restricted Stock Units, Section 16

2 terms

Restricted Stock Units financial

"forfeited 730,292 unvested Restricted Stock Units"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

Section 16 regulatory

"no longer subject to Section 16"

Section 16 is a U.S. securities law rule that governs the trading and disclosure obligations of company insiders — typically officers, directors and large shareholders — to promote transparency and deter unfair profit-taking. It requires insiders to publicly report their stock trades and allows companies or the issuer to reclaim quick, short-term profits from certain insider trades, like a scoreboard and a refund policy that help investors see and limit possible insider advantage.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many RIVN restricted stock units did Claire McDonough forfeit?

Claire McDonough forfeited 730,292 unvested Restricted Stock Units when her resignation as Chief Financial Officer became effective October 30, 2026.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 4 Insider Transactions: What Each Field Means →

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SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

X

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

McDonough Claire

(Last) (First) (Middle)

C/O RIVIAN AUTOMOTIVE, INC.

14600 MYFORD ROAD

(Street)

IRVINE CALIFORNIA 92606

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Rivian Automotive, Inc. / DE [ RIVN ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Financial Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
10/30/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Class A Common Stock	10/30/2026		D		730,292(1)	D	$0	88,886	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. As a result of Reporting Person's resignation as Chief Financial Officer of the Issuer effective October 30, 2026 (the "Effective Date"), as previously disclosed by the Issuer in its Current Report on Form 8-K filed with the Securities and Exchange Commission on August 27, 2026, as of the Effective Date the Reporting Person forfeited 730,292 unvested Restricted Stock Units previously granted. As of the Effective Date the Reporting Person is no longer subject to Section 16.

Remarks:

	/s/ Jamie Chung, Attorney-in-Fact	10/30/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)